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rf - Is there a standard that specifies the polarity when using an SMA connector (or similar) to connect a DC power source? - Electrical Engineering Stack Exchange
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I do not understand this polarity symbol with 3 circles: positive, round, negative, and no lines - Electrical Engineering Stack Exchange
Chancho Electronics - So I wired my pedals to take 9V DC center positive polarity but I know many pedal builders do the opposite and have center negative. Should I change it
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